I refer to riding and walking around town my "French exercises" because the French stay so thin by being regularly active in their lives rather than really working out.

I lost a little over 80 lbs 5 yrs ago (down from a little over 220 to right around 140) by doing a combo of the intense workouts (starting at 20 min and building up in time to an hour now) and my French exercises. The French exercises are a great way to stay active and ward off weight gain... but once you lose the first chunk of weight just from moving around more you'll stop seeing results and get discouraged (or at least I did). It was only by adding in those intense workouts 4 times a week with a heart rate monitor that I got over that plataeu. Of course, I hit another one down the round and that time only portion control seemed to get me back on track that time.

Also to stop your self from giving up find a work out buddy at a similar fitness level. I have one for weights and sometimes (like this morning) it is the ONLY thing that gets me out of bed.

One year from now you can look in the mirror and see a totally different person looking back if you stick with your goals.